Liner puller



vto dislodge them.

latented Sept. 28, 1926.

tenen THOMAS J. Picos, OF EL MONTE, CALIFORNIA.

LINER PUL'LER.

'Application sied March 17, 1925.

rlhis invention relates Vto a liner puller intended 'primarily for usein removing liners from pump cylinders, and lthe like.

'It `isan object of xthis invention to provide a liner puller for a pumpvoperable by the power employed for operating the pump.

Another object ot this invention v1s to -provide a liner puller whichlis operable to drive a liner out of its seat.

Another object of the invent-ion is to pro- 'vide a device oftheCharacter above referred to which is simple, eecti-ve and practical inconstruction. Y

The various objects 'and features ot my invention will be 'best and morefully understood from the following detailed description of a typicalpreferred form ot the invention throughout which description ret'-erence is had to the accompanying drawings in which:

Fig. 1 is a sectional view o1" a. typical form or" a direct actin-gsteam pump showing the device ,provided by my invention in operatingposition in the liner of the'pump cylinder.

Fig. 2 is van enlarged detailed-sectional view ot the device providedbythis .invention showing itin operating position'in a liner.

Fig. 3 is a transverse section taken -as indicated by line 3;?) on Fig.2 and Fig. l is the detailed transverse section view *taken as indicatedby yline 4 4 on Fig. 2. Y

The cylinders orp pumps and various like mechanisms are commonlyprovided `with liners intended to be removed and'tinished or replacedfrom time to time. It is common practice to force such liners into placeinuthe cylinders and toY vprovide packing means to make them tight wheninv place. in practice great ditliculty vis often experienced inremovingliners from cylinders as they are frequently seated very tightlyand become set vso that it `is lvery diilicult The device provided vbythis inventionis broadly applicable to removing liners in variousmechanisms. It suited, however, for the removalof pump liners. Directacting steam pumps being the piston which normally operated therein.l vIn accordance 'with standard practice I have the pump piston.

Vthe shoulder 17.

"the piston rod 13, and means 21 carried is Vpartici'i'larly Serial No.16,263.

the most common `type of pumps in 'common use, I have herein set forthmy invention yi-n combination with this particular type of pump, itbeing understood that such reference is merely for purpose ofillustration and 'to facilitate a practical understanding of theinvention and is not lto be considered as limiting the scope or range oiapplication of the invention.

The pump illustration lin 1 of lthe drawings 'being a typical and simpleform of direct acting steam pump includes, generally, a steam cylinder10, fpump cylinder 11, a suitable trame 12 carrying the cylinders, apiston rod 13 extending between the c-ylinders, a piston 14 on therod'13 in the steam cylinder 10, and various other parts common :tomechanismsot this general'character. IV have illustrated ay pump inwhich 'the' .pump cylinder 11 is provided with a typical linery 15 andhave, in the drawings, illustrated the liner puller .provided by myinvention arranged in the liner 15 in place of illustrated the pum-pendfof the piston rod 13 provided with a reduced part T16 to carry Withthis construction the piston 'rod presents a shoulder 17' against whichthe piston is held when Ain place onv the rod, the outer end of thevreduced part 16 'being threaded at '16L to receive a 4nut whichoperates to clamp the piston against The arrangement of the pump pistonon the rod is not illustrated in the drawings, however, thisconstruction fis 'employed in practically every pump of this characterand is familiar to vthose skilled in the art. y

The construction provided by my present in-vention'is intendedprimarilyto engage or L.gr-lip the cylinder hner '15 and to be actuated'by or through the operating 'means ot the pump, infthis case by thepiston rod 13, 'The form-ofthe invention illustrated inthe drawings,includes, generally,'a body 2O adapted-to be applied to and operated-bvor connected vwith the body 2O and adapted "to grip of the 'cylinderliner 15. The body `is preferably tubular in form and is provided with alongitudinal opening 22 sufficiently large to freely pass the reducedpart 16 of the piston rod. The outside of the body is provided withscrew threads 23 adapted to carry and hold the liner engaging means 21.The body 2O is adapted to be arranged on the reduced part 16 of thepiston iod between the shoulder 17 and an abut* ment, for instance a nut24 applied to the screw thread part 16a at the outer end of the reducedpart 1G. The body 2O is proportioned and the shoulder 17 and nut 21 arerelated, so that a certain amount of longitudinal movement may takeplace between the rod and body. The particular amount of movementdesired between the rod and body may vary and may be regulated byvarying the position of the nut 24 on the screw thread part 16a. lVhenthe device is operated, as will be hereinafter described, the piston rodis moved relative to the body to bring the shoulder into engagement withthe inner end of body 2O and thereby force or drive the body outwardlywith relation to the pump cylinder of liner. In order that the impact ofthe shoulder 17 driving the liner may not damage the shoulder 17, or theend of the liner, it is desirable to provide means between the shoulderand the end of the body to protect them. ln the form of the inventionillustrated in the drawings l have shown a removable cap 26 on the endof the body 2O and have also shown a protecting ring 27 arranged on thereduced part 16 of the rod in engagement with the shoulder 17. With thisconstruction the wear or distortion caused by operation of the device istaken by the parts 26 and 27. rllhese parts being` comparatively smalland simple in construction may be replaced with very little expense.

In accordance with the broader application of my invention the linerengaging means 21 may be varied in its inode of operation andconstruction it being essential only that this means be such as toeffectively and securely engage or grip the pump liner so that the lineris moved with the body 20. ln accordance with the preferred form of myinvention the liner engaging means operates to frictionally engagewithin the liner and includes, generally, a wedge member 30 and aplurality of slips 31. rlhe wedgememloer is connected to the body 20, itbeing preferred to mount it directly on the body, for instance, to screwthread it on the body as clearly shown in Fig. 2 of the drawings. Thewedge faces 32 which carry the slips 31 are provided with ribs 33 whichoperate in sockets 311 in the slips to retain the slips in position. Thebody 30 is, of course, disposed longitudinally of the cylinder liner andthe wedge faces 32 extend longitudinally of the body and are inclined orinwardly divergent, .s clearly shown in Figs. 2, 3, and 4 of thedrawings. The inner surfaces of the slips 31 are disposed to properlyfit the wedge surfaces of the wedge member, while the outer surfaces 36of the slips are curved to conform to the interior or inner surface 37of the liner. In practice l prefer to provide the outer surfaces 36 ofthefslips with a plurality of transverse depressions 50 as I find thisincreases the gripping power of the slips and l prefer to form the slipsof material which is softer than the liner so that they do not cut ordamage the surface of the liner.

As means for operating or urging the slips into position with relationto the wedge so that they grip the interior` of the liner l may providea spring L10 in connection with each slip to normally urge it inwardlywith relation to the wedge member. In the particular construction shownin the drawings springs tOvare arranged between the slips 31 and aflange member L11 retained on the outer end of the body 20 by a nut l2.The springs Ll0 are helical compression springs arranged undercompression between the flange member L11 and slips 31. The amount ofcompression of the springs and therefore the pressure with which theslips are operated may be regulated by adjustment of the nut 11 on thebody. Viith the construction which l have just described the device canbe moved freely inwardly in the liner to the desired position but assoon as it is started outwardly in the liner the slips grip the liner toprevent the outward movement. 1n practice it is desirable to provide oneor more of the slips with a screw threaded opening 70, or the like, toreceive a screw threaded rod or the like, if it is desired to releasethe device when in position in the liner. 1n the construction shown inthe drawing the flange member .t1 is provided withopenings 71 so thatrods, or the like, can be inserted into the liner from its outer end toengage the openings in the slips.

n operating the device it is applied to the piston rod in the mannershown throughout the drawings so that the body 20 is carried between theshoulder 17 and nut 211 with provision for the desired amount of move- 1ment of the rod relative to the body. With the device in place on therod it may be moved inwardly to the desired position in the linerbysuitable operation of the steam cylinder. With the device in positionsuch 1 is spaced from the inner end of the body.

rlhe part-sthus set ready for operation, steamv may be admitted intocylinder 10 to move the shoulder 17, or the ring 27, into engagementproperly gripping the liner. By applying pressure gradually to the bodythe liner may be forced out of the cylinder, however, itis usuallynecessary to return thevparts to the position s'hoivn in F ig. 2 and toapply steam to cylinder l0 to move the ring 27 quickly into engagementwith the cap 26 to impart a blow to the body. If the liner is notdislodged by a single blow the operation may be repeated and the forceof the blows varied until the liner is removed. When the liner has beendislodged the device may be easily released from the liner and removedfrom the piston rod. From the foregoing description it will be apparentthat the various degrees of pressure and impact may be obtained throughthe mode of operation just described and that the device when properlyoperated will quickly and eti'ectively dislodge a cylinder liner eventhough it may be very tightly seated.

Having described only a typical form and application of my invention Ido not wish to limit myselr" to the particular details hereinabove setforth, but wish to reserve to myself any changes or variations that mayappear to those skilled in the art, or fall within the scope of thefollowing claims.

Having described my invention, I claim :V

1. A device for use in a cylinder having a liner and a rod extendinginto it, said device including a body, means forconnecting the rod andbody for limited relative movement, and means for connecting the bodyand liner including a wedge carried by the body and av plurality ofslips operated by the wedge toV grip the liner.

2. A device for use in a cylinder having a liner and a rod extendinginto it, said device including a body, means for connecting the rod andbody for limited relative movement, and means for connecting the bodyand liner including a wedge member carried by the body, slips arrangedto be operated by the wedge member, and means normally tending tooperate the slips to cause them to grip the liner.

8. A device for use in a cylinder having a liner and a rod extendinginto it, said device including a body, means for connecting the rod andbody for limited relative movement,

and means for connecting the body and liner including a wedge membercarried by the body, slips operable by the wedge member, and springmeans normally urging the slips to position to grip the liner.

4. A device for use in a cylinder having a liner and a rod extendinginto it, said device including a body, means for connecting the rod andbody for limited relative movement, and means for connecting the bodyand liner including a wedge member carried by the body, slips-operableby the Wedg'emember, .and spring.. means! normally urging.

the slips to position to grip the liner, the springY .meansIincluding.springs each having one .end held stationary relativeto thebody and the. other end engaging a slip.

.5. A device `forfuse in acylinderhaving a liner and arod-extending'into it, saidrdevice including a body, means forconnecting the rod and body for limited relative movement, and means forconnecting the body and liner including a wedge member carried by thebody, slips operable by the wedge member, and spring means normallyurging the slips to position to grip the liner, the spring meansincluding a stop member carried by the body and springs arranged betweenthe stop member and slips.

6. A device for use in a cylinder having a liner and a rod extendinginto it, said device including a body, means for connecting the rod andbody for limited relative movement,

and means for connecting the body and liner including a wedge. memberscrew threaded on the body, slips operable by the wedge member, andspring means normally urging the slips to position to grip the liner,the springv means including a stop member carried by the body andsprings arranged between the stop member and slips.

7. A device for use in a cylinder having a liner and a piston rodextending into it, said device including a body, means for connectingthe body and rod for limited relative movement whereby the body can bejarred by operation of the rod and liner engaging means carried by thebody, said connecting means including a slidable connection between thebody and rod and stop means on the rod to limit thesliding movement.

8. A device for use in a cylinder having a liner and a piston rodextending into it, said device including a body slidably fitting therod, means on the rod to limit the sliding movement between the rod andbody so that the body can be jarredt'rom the rod, and means forconnecting the body with the liner.

9.Y A device for use in a cylinder having a liner and a piston rodextending into it, said device including a body slidably fitting therod, means on the rod to limit the sliding movement between the rod andbody so that the body can bejarred from the rod, and slips forconnecting the body with the liner.

10. A device for use in a cylinder having a liner and a piston rodextending into it, said device including a body to be mounted on therod, mea-ns whereby the body can be jarred by operation of the rod, andmeans for connecting the body with the liner.

11. A device for use in a cylinder having a liner and a shoulderedypiston rod extending into it, said device including a nut applied to therod in spaced relation to the shoulder on the rod, a body mounted on therod slidable between the shoulder and nut, rod slidable between theshoulder and nut, and means for connecting the body with the means forprotecting the shoulder, ,u and 10 liner. means for connecting the bodyWith the 12. A device for use in a cylinder having; liner. a liner and ashouldered piston rod extend- In Witness that I claim the foregoing Iing into it, said device including a nut aphave hereunto subscribed myname thisl7th plied to the rod in spaced relation to the day ofFebruary, 1925. shoulder on the rod, a body mounted on the THOMAS J.PICOS.

